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(No Model.)

B. I'. POWELSON.

PHOTOGRAPHIG SILVER EATH HEATER. No. 256,592. Patented Apr.18,1882.

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PATENT OFFICE.

BENJAMIN F. POVVELSON,

PHOTOGRAPHIC SIL SPECIFICATION forming part of Letters OF BUFFALO, NEV YORK.

VER-BATH HEATER.

Patent No. 256,592, dated April 1s, lesa.

Application tiled November 19, 1880. (No model.)

To all whom tt may concern: A

Be it known that I, BENJAMIN F. POWEL- SON, a citizen ot' the United States, residing in Buffalo, in the county of Erie and State ot' New York, have invented a new and useful Photographic Silver-Bath Heater, of which the following is a speciijcation.

The object of my invention is to provide the means for keeping a photographic silver bath at the proper temperature i'or use in cold weather in any climate; and it consists of a case or box provided with a door at the top, through which (when opened) the bath or baths may be reached or used; also, of a suitable room or warming -apartment and the means for holding the bath at an angle or ineline, in combination with a lamp or other equivalent heating device arranged in the lower part of the box or case, and a detlector and heat-radiator above the heater, the lower part of the case being provided with a door, so that the heating device or other parts may be reached, as will be more clearly hereinafter shown by reference to the drawings, in which- Figure l is a perspective view; Fig. 2, a vertical central section through the case and its several parts, the door being lett ott. Fig. 3 represents a top view of the case and its interior below the upper cover, and Fig. 4 is a horizontal section through line X X, Fig. l.

A representsthe case or box; A', the lower door, and B is the door or cover hinged to the top of the ease so as to swing over (when opened) into the position shown by the dotted lines B,Fig. 2. Near the bottom of the ease, ou each side and at the back, are two holes, C, a sufcient number only being used to allow the necessary ventilation. It' there be not enough ventilation the light would not burn well. It' there is too much, by having too many openings, C, the lightwould be instantly put out by dropping the cover B down sud denly.

C represents a lamp for producing the heat. It may be of any ordinary construction, or a gas-jet would answer.

D is a det'lector arranged directly over the heating device. It is fastened to a ilat sheetmetal plate,D,havingan opcning,E, through it. This plate forms a partition which divides the chambers E and F, and upon which the chemical bottles li(which require the saine temperature) are placed.

F represents a radiator or heat-distributcr. lt consists of a thin sheet-metal pau, and is set loosely on the plate D', so as not to t airtight, and can also be easily removed. Its object is to distribute the heat evenly and prevent it from being concentrated at any one point, so as to be liable to break the baths. Another object in making it easily removable is that it may be taken out at any time when it is desired to have a higher temperature in the upper chamber.

rlhe. letters G represent two cross braces or bars for supporting the lower end of thelargc bath G', and the blocks H H prevent it from touching the side ot' the case A, so as to leave an opening, H', through which the heat can pass up in the direction ofthe arrows f. The other side of the chamber F being open, the heat passes up between the cross-bars Gin thedirection ofthe arrowsj". A bar, H2, keeps the top of the bath G from touching the ease A.

I is a removable bar set at an angle, so as to hold the upper part of the small bath J, its lower end being supported by across-bar, J, which is formed so as to leave an opening, K, between the case and the bar, so as to allow the lient to pass up in the direction ofthe arrows g.

L represents an ordinary thermometer for indicating when thc proper temperature, is rcachcd, which, as will be readily seen, can be easily adjusted by the lamp-wick adjuster L. The lamp shown is provided with an ordinary chimney, M. The box or case being of wood or other noirconducting material, the temperature can be kept very even within it, although the temperature outside may vary. While operating with the device the cover B is thrown open, so that either bath may be reached.

l claiml. Aphotographic silver-bath hea-ter consisting ot' a case, A, having doors A and B, in combination with a heating device arranged in the lower chamber, E', a heat-distributer,

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described, for supporting' the bath in an inlined position in the upper part of the case.

B. F. POWELSON.

YVitnesses:

HUGH SANGSTER, JAMES SANGSTER. 

